Hello everyone I am obviously new to the group but not new to BMWs. Recently purchased an 03 x5 4.4 recent valve cover gasket replacement as in approx 500 miles ago. I've put 318 miles on it in my ownership. The x is now throwing misfires on bank 1 cylinders. Yes all four 1,2,3,4 and also a Vanos bank 1 cam position code. I pulled the plug cover and plug from cylinder 1 no oil on boot, coil, or plug. The plug is grey soiled. Now kinda at a loss as to how to proceed with the troubleshooting and never got to speak with the mechanic that performed the vcg replacement.

Do any of you have any next steps to diagnose this issue?